Valve-seat grinder



1,626,212 April 26, 1927. J. w. ROY

VALVE SEAT GRINDER Filed 'April 16. 1925 I NV EN TOR. Job-EPH M Eo f.

Patented l Apr. 26, 1927.

UNITED STATES PATENT OFFICE.

JOSEPH W. ROY, OF DETROIT, MICHIGAN, ASSIGNOR VOF FlFTY-ONE'ONE-HUNDREDTHS ".lOl PHILEAS DELAGE, F DETROIT, MICHIGAN.

VALVE-SEAT GRINDER.

Application' fuea Aprn 1s, 1925. serial No. 23,529.

vMy invention relates to a new and useful improvement in a valve seat grinder and has for its object the provision in a valve seat grinder of means adapted for engaging a valve stem guide for centering the grinder relatively to the valve seat.

Another object of the invention is the provision in a valve seat grinder of a centering member having a grinding member held at an inclination thereto, the angle of inclination of the grinding member being adjustable relatively to the centering member.

Another object of the invention is the provision in a valve seat grinder of a centering member which may be expanded to various lengths. j

Another object of the invention is the provision of a valve seat grinder having a centering member adapted for carrying the grinding member at an inclination thereto, the angle of inclination being variable and the distance of the grinding' member from the centering member being adjustable.

l Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings which form a part of 'this specification and in which,

Fig. 1 is a vertical central sectional view of the invention.

' Fig. 2 is a sectional view taken on substantially line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on substantially line 3-3 of Fig. 1.

As shown in the drawings the invention is adapted for use with internal combustion engines in which a valve 9 is adapted to seat on the valve seat 10. The valve 9 is provided with a valve stem 10. adapted for passing through a guide sleeve 11. The invention is designed for providing means lfor grinding the valve seat 10 and is particularly eiiicient in grinding the valve seat 10 concentrically ofthe guide sleeve 11, so that the valve 9 may securely seat on its seat throughout its seating surface. The invention comprises a tubular member 12 which is interiorly threaded 'and provided with a flange 13 at one end and a liange 14 at the other end. Threaded into the tube 12 is a stem 15 having a bore 16 formed in its lower end, the lower end being .provided with a flange 17 adapted when the device isgin operative position for engaging the upper end of the sleeve 11. Projecting from one side of the tube 12 are concentrically arranged arcuate arms 18 and 19, these arms .being struck from a center contained within the longitudinal axis of the stem 15. An interiorly threaded sleeve 18 is provided with a pair of bosses 22 each having an opening 20 formed therein for the reception of one of the arms 18 or 19. Af'set screw 21 is threaded into the boss 22 adapted to engage the arcuate arm 18 or 19 so as to xthe position ot' the sleeve 18 relatively to the position of the sleeve 12. It is evident that the sleeve 18 is always inclined to the longitudinal axis of the sleeve 12 and that this angle of inclination may be varied depending upon the position of the sleeve 18 relatively to the arms 18 and 19. Threaded into the sleeve 18 is a tubular member 23 through which is projected a shaft 21 having its upper end threaded as at 25 for the reception of the suitable coupling 26 which is secured to the flexible shaft 27. The lower end of the shaft 24. is reduced and provided with a collar 28 which engages the collar 29. Mounted upon the reduced portion 28 is a suitable grinding wheel 80 which is adapted for rotating in unison with the shaft 24. The structure is such that upon ja rotating of the flexible shaft 27 by an electric motor or'other suitable power device, the grinder 30 will be caused to rotate. Threaded into the lower end of the bore 16 is a stem 31 whichhas an outwardly projecting portion 32 adapted for engaging in the bore 33 of the sleeve 11. l

In operation the device is placed in the position shown in Fig. 1 so that the stem 82 engages in the lbore 83 and serves to center the device relatively to the valve seat 10. The angle of inclination of the sleeve 18 relatively tothe sleeve 12 is then fixed, this angle being determined bythe inclination of the surfaces of the valve seat 10. The pipe 12 and the member 15 are adjusted longitudinally to the desired length depending upon the length of the sleeve 11.

The tube 23 may be also adjusted longitu dinally of the sleeve 18. iVhen the proper adjustment has been made to these parts, the lock nuts 34 and 35 are tightened.

When the shaft 27 is set in rotation, the tube 12 carrying with it the tube 18', may

so A

be manually rotated by the operator grasping 'the upper' end of the stem 15. In this Way, the grinder 30 is properly centered relatively to the valve seat l0 and its angle of inclination .adjusted to a very fine .degree so that the valve seat may be accurately and quickly ground from a true center and With proper inclination.

lt is believed that the durability and simplicity of the various parts is apparent and that the ease with which these parts may be adjusted is evident. J

l/Vhile l have illustrated and described the preferred form of structure, l do not Wish to limit myself to the precise form of structure shown, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what l claimas new and desire to secure by Letters Patent is:

1. A valve 'seat grinder of the class described, comprising a center pin; a supporting member having a socket for the reception of said center pin; a sleeve threaded on said supporting member and adapted for threading longitudinally thereof; arcuate arms projecting outwardly from said sleeve; a tubular member adj ustably carried by said arcuate arms; a grinding member; and means for carrying said grinding member mounted in said sleeve on said arms'for regulating the distance of said grinding member from said center pin.

2. A valve seat grinder adapted for grinding a valve seat having a tubular valve stem guide projecting axially thereof, comprising a guide stem, adapted for insertion intosaid valve stem guide; a supporting member; a grinding member carried by said supporting member at an inclination to said center pin, the angle of inclination being Variable at Will, said supporting member being longitudinally adjustable relatively to said center pin for regulating the position of said grinder relatively to 'the end of said center 1n. v P 3. A valve seat grinder of the class described, comprising a center pin, adapted for insertion into a valve stem guide; a shaft having a socket for the reception of one end of said center pin; a sleeve threaded on said shaft; a pair of arms projecting outwardly from said sleeve, said arms being arcuate; a grinding member supported on FVsaid arms and movable circumferentially of said arms for varying the inclination of said grinding position of said grinding member at various distances from the end of said guide stem.

A valve seat grinder adapted for grinding a valve seat having 'a tubular valve stem guide projecting axially thereof, comprising: a guide'stem adapted for insertion into said valve stem guide; a supporting member carried by said guide stem; a grinding member carried by said supporting member at an inclination to said guide stem the angle of inclination being variable at will; adjustable means, longitudinally movable of said supporting member for engaging the upper end of said valve stem guide.

G. A valve seat grinder adapted for grinding a valve seat having a tubular valve stem guide projecting axially thereof, comprising: a guide stem adapted for insertion into said valve stem guide; a supporting member carried by saidguide stem; a grinding member; means for supporting said grinding member on said supporting member at an inclination to said guide stem, the angle of inclination being variable at Will; and means for moving said grinding member axially rela-tively to said guide stem.

ln testimony whereof, have signed the foregoing specification.

Josnri-r 1W. nov'.` 

